Method for producing nanometer-sized ultrafine titanium dioxide
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United States of America Patent
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Sep 2, 2003
Grant Date -
Jan 10, 2002
app pub date -
Apr 5, 2001
filing date -
Apr 7, 2000
priority date (Note) -
Expired
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Abstract
A method for producing nano-sized titanium dioxide (TiO.sub.2) ultrafine powder from titanium tetrachloride (TiCl.sub.4) in the vapor phase by the gas phase oxidation reaction using flames, in which the method comprises: simultaneously introducing titanium tetrachloride (TiCl.sub.4), vapor, argon, oxygen, hydrogen and air into a five-piped flame reactor to form a flame having a temperature of greater than 1,000.degree. C.; and producing nano-sized titanium dioxide ultrafine powder having an average particle size of less than 50 nm.
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